The average weight of 6 persons is 65 kg. If a person weighing 80 kg joins, what is the new average? MCQ with Answer and Explanation

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The average weight of 6 persons is 65 kg. If a person weighing 80 kg joins, what is the new average?

A. 67.5 kg

B. 68 kg

C. 66.67 kg

D. 67.14 kg

Answer: Option D

Solution (By JKSSB Mock Tests)

Sum=6×65=390. New sum=390+80=470. New avg=470/7=67.14.

This question belongs to: Maths Average

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Correct Answer: Option C

Explanation:
Sum=129. Average=12.9.

This question belongs to: Maths Average

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Average of 20 numbers 35. If 5 numbers average 40 included, new average of 25?

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The average of 4 numbers is 25. If each number is multiplied by 3, what is the new average?

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Correct Answer: Option C

Explanation:
If each number is multiplied by a constant, the average also gets multiplied by that constant. New average = 25×3=75.

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